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John Deere E140 Troubleshooting

The John Deere E140 is a E100 series lawn tractor. This model was manufactured from 2018. The components of John Deere E140 powerline system: Briggs and Stratton 44N677 4-cycle vertical-shaft V-twin OHV air-cooled gasoline engine and belt-driven hydrostatic transmission with infinite forward and reverse gears.

A 44.2 cu.in (724 cc) engine has a max power of 22 hp (16.4 kW), full pressure lubrication, and air cleaner with multi-stage filter. Max. forward speed - 5.5 mph (8.8 km/h), maximum reverse speed - 3.2 mph (5.1 km/h). The John Deere E140 is equipped with 15x6.00-6 front tyres and 20x10.00-8 rear tyres.

The wheel base is 49" (1240 mm). The tractor is compatible with the following attachments: a 48" mid-mount 3-blade mower deck with a cutting height of 1.0-4.0" (25-102 mm), 44" front-mount 2-stage snowblower, and 46" front blade with mechanical lift.

Engine Troubleshooting
Engine difficult to start or won't start
Empty fuel tank - Fill it up
Wrong grade of gasoline - Change gasoline
Air trapped in fuel system - Bleed air
Disconnected or loose spark plug wire - Check spark plug wiring connection, repair or change
Damaged spark plug - Install new spark plug
Clogged fuel filter - Fuel filter needs changing
Faulty safety switch - Change damaged switch
Wrong carburetor adjustment - Adjusting carburetor correctly
Bad compression - Check and change damaged parts
Choke cable is damaged or not adjusted properly - Change cable or adjust correctly
Engine runs irregularly
Air intake grill is clogged - Clean and wash as required
Defective ignition system - Check ignition system and replace faulty parts
Throttle cable is faulty or stuck - Replace or clean the cable
Air filter element is clogged - Clean or change air filter
Clogged or damaged fuel pump - Inspect fuel pump and change as required
Engine stops after starting
Damaged spark plug - Change spark plug as required
Dirty or defective carburetor - Carburetor needs to be replaced or cleaned
Faulty ignition coil - Ignition coil should be replaced
Broken or loose valve springs - New valve springs need to be installed
Valves are stuck - Service the valves
Engine overheats
Lack of engine oil - Checking oil level and add if necessary
Engine is running overloaded - Load reducing is recommended
Air intake screen is plugged - Wash or clean as required
Too lean fuel mixture in carburetor - Make the correct settings
Ignition timing is improper - Ignition timing needs to be adjusted correctly
Wrong valve setting - Valves needs to be set correctly
Engine noises or knocks
Low octane gasoline - Use proper fuel
Engine is under excessive load - Reduce the load
Engine oil insufficient - Need to add engine oil
Improperly adjusted low idle speed - Adjustment required
Dirty or faulty fuel pump - Clean or install new fuel pump
Crankshaft or main bearings failure - Repair or replace defective parts
Valve clearance is incorrect - Adjust valve clearance
Damaged piston rings or cylinder bore - Replace faulty components
Engine power is insufficient
Clogged or improperly adjusted carburetor - Carburetor needs to be adjusted correctly or cleaned
Air filter element is plugged - Service or replace air filter
Fuel pump is defective or dirty - Test fuel pump and change if necessary
Ignition failure - Inspect ignition system and change faulty parts
Defective cylinder head gasket - Change cylinder head gasket
Stuck or burned valves - Service or replace valves
Worn or defective push rod - Install a new push rod
Faulty cylinder block parts - Defective parts need to be replaced
High fuel consumption
Throttle is not fully open - Change or adjust throttle cable
Incorrect adjustment of carburetor main jet - Adjust it correctly
Spark plug is loose or faulty - Re-tighten or change the spark plug
Valves are stuck, burned, or worn - Replace or clean valves
Piston, sleeve, or rings are damaged - Replace defective parts as required
Incorrect valve clearance - Adjust valve clearance according to specifications
High engine oil consumption
Damaged gaskets or seals - Worn parts need to be replaced
Valve stems and guides are worn - Replace defective valves
Piston rings are stuck or worn - Install new piston rings
Scuffed cylinder liner or piston - Inspect liner and piston, fit new parts as necessary
Breather pipe or hose is plugged - Change or service

Hydrostatic Transmission Troubleshooting
HST transmission makes noise
Worn or out of adjustment speed control linkage - Adjust or replace linkage
Transmission overload - Reduce transmission load
Dirty transmission fluid or insufficient fluid level - Top up to proper level or change transmission fluid
Defective or worn transmission parts - After disassembly and inspection, replace defective components
Shifting is hard
Shift linkage is damaged or loose - Replace or service the linkage
Hydrostatic pump is seized or faulty - Repair or change pump
Transmission shift control components are worn or unadjusted - Change or adjust correctly
Loss of power
Transmission fluid level is low - Need to add transmission fluid
Drive sheave is damaged or worn - Change sheave
Shifter linkage is faulty or not adjusted - Adjust properly or change linkage
Worn or unadjusted speed control linkage - Replace or adjust linkage
Transmission leakage
Worn transmission seals or gaskets - Change gaskets or seals
Leaking final drive shaft - Install new shaft seals
Transmission housing is cracked - Replace housing or transmission assembly

Mower Deck Troubleshooting
Excessive mower vibration
Mower deck drive sheave is clogged or worn - Clean or replace sheave
Drive belt is loose or defective - Belt needs to be adjusted or replaced
Mower blades are warped or not balanced - Replace or balance blades
Blade bolts are not tightened well - Tighten bolts as required
Discharge chute is constantly plugged
Ground speed is too fast - Select a lower speed
Grass is too long - Must be set to low cutting height
Engine is running at too low speed - Adjust choke to full opening
Cutting level is too low - Must be set to high cutting height
Mower deck drive belt installed incorrectly - Install drive belt as required
Streaking of uncut grass
Deck is plugged with grass - Clean mower deck as required
Blades are not sharp - Sharpen the blades
Worn or damaged blades - Install new blades
Fast mowing speed - Use a slower speed
Cutting level is too low - Use a higher cutting height
Grass bag is full - Clean grass bag
Blades scalp the grass
Lawn is uneven or bumpy - Roll or level the lawn
Cutting height is too low - Raise the cutting height
High ground speed - Need to slow down
Improper mower deck level - Deck should be adjusted correctly
Damaged or bent blades - Blades need to be replaced
Tire pressure is too low - Check and inflate the tires
Mower deck to cut unevenly
Tires are not properly inflated - Correct tire pressure
Mower deck is not leveled properly - Level the deck properly
Excessive blade dullness - Blades need to be sharpened
Blades are defective or worn - Blades need to be replaced
Deck clogged with grass clippings - Check cutting deck and clean as necessary
Damaged mower deck shell - Rebuild or change mower deck
Mower spindle is faulty or loose - Replace or repair the spindle

Electrical Troubleshooting
Battery does not charge
Electrical cable connections are loose or corroded - Clean or tighten wiring connections
Defective battery terminal clamps - Terminal clamps should be changed
Battery dead cell - Use a new battery
Starter cranks slowly
Battery capacity is low - Battery is drained, charge it
Battery does not hold charge - Battery needs to be serviced or replaced
Battery cables are disconnected or terminals are faulty - Connect cables properly or replace terminals
Starter motor won't turn
Battery is drained or defective - Recharge or replace battery
Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required
Battery voltage is low - Recharge the battery
Spark plug dirty or improperly gapped - Clean and gap or replace
Solenoid or starter motor failure - Starter/solenoid needs to be replaced




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